There is something to be said about how the refusal to engage with anti-transmasculinity theory goes beyond the erasure of transmascs.
When you say "masculinity is always rewarded in patriarchal society" you not only ignore the way malgendering is a tool used to harm transmascs, but you also ignore:
The hypernasculinization of black women in order to justify their brutalization
The hypermasculinization of black men in order to sexualize them and justify their brutalization
The brtualization of tomboys and butch cis lesbians for their gender non conformity
The brutalization of cis feminists throughout history for simply trying to gain rights that were seen as inherently masculine to have.
The brutalization of transfems through misgendering in order to justify their brutalization (i.e. calling them predatory men, weaponizing masculinity against them with or without that being their actual presentation)
The misgendering and erasure Gender non-conforming or masculine transfems, noth binary and non-binary
Intersex people that are coerced/medically altared into being assigned female who are marginalized when they present any sign of masculinity
Cis and intersex and WOC (especially black women) who's testosterone levels are used to justify their exclusion from their careers and passions in sports without an alternative place to go
The way masculinity in mentally disabled men, especially black disabled men and boys, intersects with how a lot of mental disabilities are labelled as agressive and dangerous, further justifying these men's brutalization (see: cops killing young black autistic boys in meltdown)
Masculinity is always rewarded in people that society doesn't want to brutalize. Masculinity is a tool to justify the brutalization of people society wants to keep suppressed. To say otherwise is just factually wrong.
And this is just one phrase used to dismiss anti-transmasculinity theory. There is a lot more to intersectionality that needs to be analyzed, not just for the benefit of transmascs, but for everyone.